Hydraulic pump



FIG. 1 is a first perspective view of a hydraulic pump showing my new design;

FIG. 2 is a front side view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a rear view thereof.

The broken (dashed) lines shown in the figures are included for the purpose of illustrating portions of the hydraulic pump which form no part of the claimed design. 

CLAIM The ornamental design for a hydraulic pump, as shown and described. 